Full list of all 27 Duke Nukem 3D: 20th Anniversary World Tour achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Find 70 secret areas.
Kill 1000 enemies.
Kill a Firefly Trooper while it's flying small.
Find Sam in "Mirage Barrage".
Find Luke in the Level "Lunar Reactor".
Step in a pile of excrement.
Find the Doomguy in the Level "Death Row".
Use the hookah in High Times.
Find any secret level.
Tip an exotic dancer.
Kill 10 bad guys in 10 seconds while on steroids.
Burn 50 bad guys to death.
Carry all weapons with ammo at once.
Kill 5 bad guys with one shot.
Complete "Alien World Order" on any difficulty.
Complete "The Birth" on any difficulty.
Complete "Shrapnel City" on any difficulty.
Kill every enemy on a level.
Complete "Lunar Apocalypse" on any difficulty.
Complete "L.A. Meltdown" on any difficulty.
Step on 40 enemies after using the Shrinker on them.
Use the Incinerator
Finish the "Hollywood Holocaust" level in under 3 minutes.
Finish any level on "Damn, I'm Good" difficulty.
Listen to Developer Commentary (Use at least one trigger).
Use a cheat code.
Find a secret area.